Sorting machine



BEST AVAILABLE COPY SORTING MACHINE Filed Oct. 28, 1936 4 Sheets-Sheet, l

BEST AVAILABLE COP\ March 14, 1939. F, F R AL 2,150,216

SORT ING MACHINE Filed 001.. 28, 1956. 4 Sheets-Sheet 2 @rarmwmia ,1 1 VENYTOR.

ATTORNEY BEST AVAILABLE COPY March 14, 1939. FULLER ET AL 2,150,216

SORT ING MACHINE Filed Oct. 28, 1936 4 Sheets-Sheet 5 FIG. 4

ATTORNEY BEST AVAiLABLE COPX SORTING MACHINE Filed Oct. 28, 1936 4 Sheets-Sheet 4 BQW M A TTORNEY 'ivlar. 14, 1939 a UNITED STATES PATENT OFFICE SORTING MACHINE Frederick L. Fuller, West Orange, N. J., and Samuel Brand, Binghamton, N. Y., assignors to International Business Machines Corporation New York, N. Y., a corporation of New York Application October 28, 1936, Serial No. 107,966

10 Claims. (01. 209-122) This invention relates to sorting machines and the like and more particularly relates to control devices for sorting drums.

It is an object of this invention to provide an improved arresting and alining device for a sorting drum.

Another object is to provide a novel means to arrest a drum or reel which is adapted to rotate in either direction.

A further object of this invention is to provide an arresting device which will stop the rotation of a drum quickly, accurately; and with a minimum of shock to the mechanism.

With these and incidental objects in view, the mechanism includes certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claims and a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form part of this specification.

In said drawings:

Fig. 1 is a general view illustrating the type of machine to which the invention is applied.

Fig. 2 is an enlarged view in elevation of the arresting mechanism.

Fig. 2a is a fragmentary View of a part of the drum locking device.

Fig. 3 is a sectional view on line 3-3 of Fig. 2, showing the stop arm latching device in latching position.

Fig. 4 is a top plan View of the mechanism shown in Fig. 2.

Fig. 5 is a sectional view on line 5-5 of Fig. 4.

Fig. 6 is a diagram showing the wiring connections for the electrical instrumentalities of the machine.

The arresting device forming the subject matter of the instant invention is adapted to be applied the keys of a second keyboard to bring the selected compartment into registration with the aperture. The sorting drum is controlled to rotate from its last position to the selected position in the direction of the shortest distance.

These machines are provided with a plurality of totalizers, there being a totalizer for each sorting compartment of the drum. The amount of each check sorted into a particular compartment is entered into the totalizer identified with the compartment. These totalizers are mounted in a reel and are rotated with the drum simultaneously to select the proper compartment and its associated totalizer. The compartment drum and totalizer reel have considerable weight. They must be quickly rotated to the selected position, brought to a smooth quick stop, and accurately alined with the selected compartment in registry with the aperture and the selected totalizer in position to co-operate with the adding mechanism. The instant invention has for its purpose such stopping and alining of the drum.

Referring to Fig. 1, the drum H3 is securely mounted on the shaft ll, suitably and rotatably supported in the main framework of the machine. The drum I is adapted to be driven by a continuously running motor (not shown) through a two-way clutch which drives a sprocket gear 12 (Figs. 1 and 2) in either direction. A chain l3 passes around the sprocket l2 and also around a sprocket gear 14 secured to the shaft l I. An adjustable idler gear I insures the proper tension on the chain 13.

The machine is mounted in a framework indicated generally at It, and is supported on a base IT. The two-way clutch mechanism is mounted between a pair of brackets l8 and 19 secured to the base IT. The motor (not shown) is mounted on the base 11 and drives the clutch mechanism to machines of the type disclosed in the patent to through a shaft 20 mounted in the brackets 18 and Fuller, u d February 5, 1935, and I9 and directly connected to the armature shaft in application for Letters Patent of the United of t t s d w haft 20 midway States serial 743,044 filed septemkfer 1934 tween the brackets I8 and i9 is a driving clutch by Euner Samuel Brandn thought member 2|, comprising a pair of clutch plates 5 that a br1ef descr1pt1on of the machine to which 22 and 23, which rotates continuously with the i instant mventlon 1S adaptgd to be applied W shaft in the direction indicated by the arrow on a list and sort groups of pfiomiscuously arran ged adiacerm the driving clutch plates 22 i 23 "i 50 checks. The amounts of the checks are listed on dr lven clutch p1ate s 24 and a provlded Wlth a temkey keyboard and the checks are then suitable clutch facing material indicated at 2B. dropped into an aperture which communicates The clutch plate 24 is mounted on Sleeve 27, with a Sorting drum provided t a plurality of which sleeve is also integral with a gear 28. The compartments arranged annularly about the clutch plate 25 is similarly connected by a sleeve drum. The drum is rotated under the control of 29 to a gear 30 on the shaft 20.

The gear 28 meshes with an intermediate gear 36 which meshes with a gear 3? fast on a shaft 38 mounted in the brackets l8 and I9 and on which is secured the sprocket gear H2. The gear 36 meshes with a gear 59 fast on shaft 38.

Obviously, if the clutch plate 2 is brought intooperative contact with the driving plate 22, the plate 2 and the gear 28 will be driven in a clockwise direction, and, through the gears 35, will drive the gear 3'1, shaft 38 and sprocket gear l2 also in a clockwise direction to rotate the drum H] in the same direction. However, if clutch plate 25 is brought into contact with the drum plate 23, the plate 25 and the gear 35 are rotated clockwise. The gear 35 meshing directly with the gear 39 drives shaft 38 and sprocket gear E2 in a counterclockwise direction to rotate the drum l0 counterclockwise.

The operation of clutch plates 2A and 25 is controlled by the position in which the drum stands and by the particular selector key 45 (Figs. 1 and 6) depressed. Fixed to the framework of the machine and surrounding the drum shaft H is a disk ll of insulating material upon which is mounted a series of brushes 42 arranged annularly about the disk, there being a brush 52 for each selector key All. Referring to Fig. 6, these brushes 42 are connected by wires 45 to one side of pairs of contacts M adapted to be closed upon depression of a selector key M. A commutator, comprising conducting segments 35, 45, and ll, shown diagrammatically in Fig. 6, is mounted in insulating material and fixed to the drum shaft l l adjacent the disk 4 l. The brushes 12 mounted on the disk il contact the segments 45, 45, and ll. When the drum it is at rest, the segment 65 is in contact with the brush 42 connected to the contacts M associated with the last depressed selection key 45. The segment 45 is electrically connected to a ring Al".

Assuming that the main switch (not shown) is closed and the motor running with the sorting drum standing at the last selected position, for example the 1 position, with the 1 key ii! depressed we now depress the 13 compartment selector key 60. Depression of this key releases the 1 key which is immediately returned to undepressed position opening the corresponding contacts Ml. Depression of the 13 key ii) closes its contacts 4 1, whereupon a circuit is set up from a line 48, normally closed contacts 49, contacts 5i) and 5!, wires 52, 53, and 5d, contacts 4 5 for the "13 compartment key, wire 43 to the corresponding brush d2, segment 15, ring 41', a brush 55, wire 56, contacts 5?, wire 58, relay 59 to the other side of the line 50. This energizes relay 59 which closes contacts 56 and 5?, establishing a holding circuit for relay 59 extending as follows: from line 58, contacts '59, 50, and 5!, wire 52, wire 53, contacts 68 closed at this time, wire 59, contacts 61, relay 59, to line 66. Closing contacts 58 establishes a circuit from line 48, contacts d9, 50, and 5!, wires 52 and 53, contacts 68, wire 59, contacts 66, wire It, relay ll, Wire 72, to line 50.

The contacts 58 (Fig. 6) are held open by a magnet 59 so long as a key Ml is depressed and the drum ill is in a position of rest. When a new key 40 is depressed a magnet H9 is deenergized (in a manner more fully described later) allowing contacts l 51 to open. This deenergizes the magnet |59 permitting contacts 58 and It!) to close.

Energization of relay i! opens contacts 57 and 13, and closes contacts 74 setting up a circuit from line 48, contacts i9, 50, and 5i, wires 52 and 53, contacts i l, clutch magnet 15, contacts 76 and 'l'! (closed at this time), to line 50. clutch magnet 75.

Referring now to Fig. 4, when the magnet I5 is energized it attracts its armature l8 which is carried on the end of a lever 19 pivoted at 89 on a bracket 8i mounted between the brackets i8 and l 9. This rocks the lever 19 clockwise (Fig. 4).

Pivotally carried by the lever is, at the end opposite the armature i8, is a pair of yokes 82 and 83. These yokes carry rollers 84 and 85 projecting into annular grooves 85 and 8? in the sleeves 29 and 2'! respectively. At their opposite ends the yokes 82 and 83 carry adjusting studs 83 and B9 bearing against the bracket 8 I.

When the lever 79 is rocked clockwise under the influence of clutch magnet (15, it rocks the yoke 82 also clockwise, bringing the clutch plate 25 into contact with the driving member 23, whereupon the gear Si) is driven clockwise (Fig. 2) rotating gear 39 and sprocket gear 52 counterclockwise to rotate the drum if in the same direction until the segment l5 contacts the brush 52 associated with the depressed key, in the instant example, the 13 key. The drum is stopped in this position by mechanism later to be described.

Assuming now that the 12 selector key 40 is depressed instead of the 13 key. When the drum it is standing in the 1 position the drum will rotate in the opposite or clockwise direction to This energizes bring the 12 compartment into registry with the no connection to the electrical elements is ineffective to energize the relay H, therefore, upon closure of contacts '85 and H, a circuit is established from line it, contacts 49, 50 and 5!, wires 52 and 53, contacts 13, clutch magnet 98, contacts it and H (now closed) to line 60. As long as the drum i5 is in a position of rest with a key 20 depressed the contacts I! are normally open under the control of a magnet I44. This magnet functions in connection with a latch mechanism (see Fig. 3) more fully described later. Depression of a new key 48 opens the circuit to the magnet I44 whereupon the contacts 'l! are closed and remain closed until the drum it arrives at its newly selected position. At this time the magnet M4 again is energized and contacts 17 open.

The contacts '16 are controlled by a lock arm 93 (Fig. 2). As long as the drum H! is in a posititon of rest and the lock arm 98 is in the position in which it is illustrated in Figure 2 the contacts 1'5 are open. When a new selector key 46 is depressed the arm 98 is disengaged closing contacts 75 until the drum it arrives at its newly selected position whereupon the arm 98 is reengaged to lock the drum opening contacts 15 as is more fully described.

Energization of magnet 98 rocks the arm 79 (Fig. 4) counterclockwise, engaging the clutch plate 24 with the driven plate 22, which, through the gears 28, 36 and 3'! rotates the sprocket gear l2 and the drum I!) clockwise until the segment '15 contacts the brush 42 for the 12 key 40.

The drum l I) is held in position by a pair of stop arms 9E and 9'! (Figs. 4 and 5) and is accurately alined in position by a lock arm 98 (Figs. 2 and 2a). A spring 55 urges the latch arm 98 clockwise (Figs. 2 and 2a) to effective position. The stop arm is pivotally supported at 99 by a pair of arms H10 pivoted on a stud lfll projecting from a frame H12 secured to the base I1. The stop arm 9'! is similarly supported at I03 by a pair of arms BEST AVAILABLE COP;

I04 pivoted on a stud I05 in the frame I02. A spring I09 stretched between projections on the arms 96 and 91 normally holds these arms in their eifective or raised positions.

The stop arms 96 and 91 co-operate with blocks I01 secured to the side of the drum I0, there being a block I01 for each compartment position on the drum. Before the drum can be rotated, it is necessary to withdraw the arms 95 and 91 clear of the particular block I01 then between said arms. To this end the stop arms 96 and 91 are provided with hooked projections I08 and. I09 respectively. Extending immediately above these projections is an ear I I0 bent over from the free end of a lever I I I pivoted on a stud I I2 in the frame I02. A link I I3 pivotally connected to the lever I I I has secured to its lower end the armature I I4 of a solenoid I I 5.

Energization or the solenoid II5 attracts its armature H4, drawing the link I13 downwardly and rocking the lever II I counterclockwise. This movement of the lever I I I, through the ear I I0, rocks the stop arm 99 clockwise and the stop arm 91 counterclockwise, thus moving said stop arms out of the path of the blocks I01.

The solenoid H5 is energized in the following described manner with reference to Fig. 6:

A circuit extends through the solenoid I I5 from line 48, contacts 49, 50 and 5|, wires 52, 53, and 54, contacts H6, solenoid H5, normally closed contacts II'I, contacts H9 to line 50. This circuit is normally open at the contacts H6, held open by a magnet II9, which is energized as long as a key 40is depressed and the drum stands at a position corresponding to the depressed key, the circuit extending as follows, assuming the 1 key to be depressed: line 49, contacts 49, 59 and 5I, wires 52, 53 and 54, contacts 44 for the 1 key, wire 43 to the 1 brush 42, segment 45, ring I20, a brush I2I, wires I22 and I29, magnet II9 to line 69.

When another key is depressed, the previously depressed key, in this example the 1 key, is immediately released and restored to its undepressed position permitting its contacts 44 to open. This opens the circuit through the magnet I19 which, becoming deenergized, permits contacts I I9 to close establishing the above described circuit through the solenoid II5.

As the latch arms 95 and 91 approach the lower limit of their movement, ears I24, formed on the free ends thereof, come below the bent end of a latch arm I25 (see Fig. 3), which arm is immediately rocked clockwise (Fig. 3) by a spring I29 to latch the stop arms 99 and 91 down in their inefiective positions.

Before the drum I0 is free to rotate, the lock arm 98 must be removed to ineifective position. The nose of this arm. normally rests in a notch formed in the blocks I01. The lock arm 98 is withdrawn by a magnet I21, (Figs. 2 and 6) which is energized, under control of, the stop arms when they are withdrawn, to free the drum for rotation. Mounted near the stop arms 95 and 9!" are pairs of contacts I20 and I29 having their inner blades bent outwardly at an angle. These angular ends of the inner blades carry blocks I of insulating material. Studs I36 and 531', projecting respectively from the stop arms 90 and 91, co-operate with the blocks I30 to hold the pairs of contacts I28 and I29 open when the stop arms are in their effective positions. When the stop arms and 91 are pulled down to free the drum I9, the studs I36 and I31 are carried out of contact with the blocks I30, whereupon the contacts I28and I29 are closed by the spring tension of the blades.

Closure of contacts I28 or I29 or both energizes magnet I21, which attracts its armature I38 and rocks the lock arm 98 clear of the block I01.

It was set forth above how, as the stop arms 96 and 91 approach the limit of their downward movement the latch I25 (Fig. 3), under the influence of its spring I20, rocks clockwise to latch arms 99 and 91 down. The arm I25 is pivoted at I39 and has a downwardly extending tail I40 to which the spring I26 is attached. The tail I40 carries an insulating roller I4I, which oooperates with the center one of three contact blades. As viewed in Fig. 3 the right hand pair of contacts I I8 (see also Fig. 6) is normally closed and the left hand pair of contacts I1 are normally open. As the latch arm 25 rocks clockwise to latch the stop arms 95 and 91' down, the tail I40 through the roller I4I opens contacts H8 and closes contacts'I'I. When the contacts II8 are opened, the solenoid H5 (Figs. 2 and 6) is deenergized, allowing a spring I42 (Fig. 2) to raise the arm III, link H3 and armature H4 to their upper positions.

Closing of contacts 11 completes the circuit through the selected clutch magnet 15 or 90 upon closure of contacts 19. These latter contacts are closed by a tail I43 (Figs. 2 and 20.) secured to the lock arm 98 and rocked therewith. Contacts 19 are therefore closed when the lock arm. 99 is rocked clear of the block I01. The drum I0 is then free to rotate and the proper one of the clutch magnets is energized to drive the drum to its newly selected position.

The drum continues to rotate until it arrives at the position wherein the compartment corresponding to the depressed key comes opposite the check aperture, whereupon the rotation of said drum is arrested and the drum accurately alined in position by mechanism now to be described.

It will be remembered that the commutator comprising the segments 45, 49, and 41 (Fig. 6) rotates with the drum I0, whereas the disk M together with the brushes 42 remain stationary. As soon as the segment 45 contacts the brush 42 corresponding to the depressed key, a circuit is established from line 43, contacts 49, 50, and 5!, wires 52, 53, and 54, contacts 44 of the depressed key, corresponding wire 49, brush 42, segment 45, ring I20, brush I2I, wire I22, a magnet I44 to line 90. Energization of magnet I44 (see Fig. 3) attracts its armature I45, which is secured to the latch arm I25, rocking the latter counterclockwise in Fig. 3 to free the stop arms 90 and 91. The spring I06 (Figs. 2 and 5) immediately throws the stop arms upwardly to effective position. If the drum I0 is rotating in a clockwisedirection, the block I01 wipes over stop arm 91 and strikes arm 95. If rotating counterclockwise, the block I01 wipes over arm 99 and strikes stop arm 91.

A slide I 46 (Fig. 4) is pivoted at its left hand end on the stud 99 on which the stop arm 96 is pivoted. The slide I49 is slotted to surround and slide over the stud I93. Similarly, a slide I41 has one of its ends pivoted on the stud I03 on which is pivoted the stop arm 91. The slide I41 is slotted at I49 (Fig. 2) to slide over the stud 99. Between the slides E45 and M1 is mounted a friction member I49 of suitable material. The slides I 49 and I41 are pressed against member I49 by springs I50 surrounding studs [BI mounted in the slide I 46 and projecting through the slot I48 and a slot I52 in slide I41.

Between the studs 99 and I03 is stretched a spring I53 (Fig. 4). Another spring I54 is compressed between the stud H33 and the bent end I55 of the slide M56. The spring 554 surrounds a pivot stud I56 secured to the stud m3 and which passes through the end I55 of the slide MB.

Assuming that the drum i8 is rotating counterclockwise, the block Itl'i strikes the stop arm 91 (Fig. 2). The shock of the blow is absorbed by the friction element M9 and by the springs I53 and IM, which springs act to bring the block I0? and the drum to the position wherein the selected compartment is in registry with the check aperture (not shown). When the block '50! strikes the arm it stretches spring i555 (Fig. 4) and compresses spring (Figs. 2 and 4) and rebounds against arm 95. The same action, but to a lesser degree, occurs when block till rebounds from arm at. This rebound or chatter would be quite extensive if the springs E53 and 55d alone were depended upon to bring the drum to rest. The friction member i ifi is provided to dampen the rebound of the springs.

It is necessary that the lock arm 98 (Fig. 2) be maintained in its ineffective position until the drum II) has come to a complete rest. This is effected by maintaining one or the other of the contacts i328 and 529 closed until the drum is completely stopped. This maintains, the magnet 52'? energized to hold the arm 98 in its disengaged position. When the block iii? strikes the stop arm 91, this arm, as stated above, is moved to the right (Figs. 2 and 4) carrying the stud l3? therewith away from the insulating block 538. This permits contacts E29 to remain closed. When the springs H3 and i5 3 rebound, carrying the drum Ill and block it! back past center, said block it)? strikes the stop arm 96 moving it slightly leftward, at which time the stud B35 is carried away from the insulating block i351. This permits contacts I28 to close. Thus, if the block i5)? is oif center in either direction, one or the other of the contacts I28 and E29 is closed. As soon as the drum comes to a complete rest, both contacts H8 and I23 are opened, deenergizing the magnet I21, whereupon the lock arm 93 is rocked clockwise by a spring 95 (Fig. 2a) accurately to align the drum.

The instant the segment 35 (Fig. 6) comes into contact with the brush 4? corresponding to the depressed key, the magnet hi l (see also Fig. 3) is energized over the circuit previously traced in order to release the stop arms and Eli. Energization of magnet M l rocks the arm M1) counterclockwise (Fig. 3) closing contacts H3 and opening contacts ll. This opens the circuit through the selected clutch magnet 75 or 95). A holding circuit is provided for the clutch magnet, since it is desired to drive the drum iii until an instant before the block it? strikes the stop arm 55 or 9! depending on the direction of rotation of the drum. This holding circuit is set up as follows:

The magnet lie remains energized so long as the drum is stationary at a compartment position. In this condition contacts 95! (Fig. 6, near lower left hand corner) are held closed, maintaining a circuit from line 48, contact-s Ifil, wire 958, a relay 659 to line 6!]. This holds the relay E59 energized holding contacts IE6 and 58 open. Upon depression of another key, as set forth above, the circuit through magnet I I9 is opened and this magnet deenergizes allowing contacts iii? to open. This deenergization of relay I59 permits contacts I66 and $8 to close. It was described above how contacts 68 provided a holding circuit over wire 3E5? AVNMBLE @UPY 69, contacts 51, relay 59 for the latter and also energized magnet l I. Closure of contacts I60 causes energization of a clutch holding relay I55 over a circuit as follows: line 48, contacts 49, 5E), and 5|, wires 52 and 53, contacts Q60, wire I61, relay I66, wires i68 and IE9, contacts l6 and 7! (now closed) to line Bil. Relay its closes contacts H0 and I'll, the contacts H9 establishing a holding circuit for the selected clutch magnet I5 or 92) over wire I69, contacts I'll), a wire M2 to line 6!]. The contacts IIl establish a second holding circuit for the relay 59 extending from line 48, contacts 49, 5i and 5t, wires 52 and 51%, wire I13, contacts I'ii, wire $9, contacts S'i, magnet 59 to line Gil. This circuit also holds through contacts 66, wire to, magnet lI, wire IE to line 65], holding the magnet Ii energized.

When the segment 45 contacts the particular brush 42 corresponding to the depressed key, the block t ll (Fig. 2) is some distance from the point midway between stop arms 96 and 97. However, at this instant, the magnet M4 (Fig. 6) bceomes energized opening contacts iii, which would open the circuit for magnets I5 and 96 were it not for the holding circuit over wire I69, contacts I70, and wire H2.

At the same time that the magnet I44 is energized, the magnet l I9 is energized closing contacts H57. This energizes relay i555, opening contacts '63 and 568. The contacts 68 open the circuit to relay 59 over wire 69, contacts 67, relay 59 to line 66. The relay 58 is maintained energized for a brief period over wire H3, contact I'II, wire 69, contacts iii, relay 5! to line (it. This holds the contacts 86 closed and the clutch relay ll energized.

Opening of contacts ifill, however, opens the circuit to relay 5% which, becoming deenergized, allows contacts Illii and Hi to open; the contacts i'l'ti opening the circuit through the clutch magnet I5 or 9B, and the contacts ill opening the circuit through magnets 59 and II. The contacts 66 and ti thereupon open and the contacts 74 open and contacts it close. After contacts 7? are opened by magnet Hi l, the delay due to energizing relays H9 and i5!) and deenergizing relay N36 is sufficient to maintain the clutch magnet 75 or St) energized until an instant before the block it)? strikes the stop arm 56 or 97.

It is to be understood that the relays 59 and Ii are energized only when the drum Ill rotates counterclockwise, that is, when a key in the group I3-2l is depressed. If a key I-i2 inclusive is depressed, no circuit is established over segment it, wire 56, wire 58, relay 59. Thus, relay 59 is not energized, contacts I56 remain open and relay II is not energized. The contacts 73 remaining closed cause energization of clutch magnet 93. The functions of relays I59 and H36 are the same whether clutch magnet I5 or is selected.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. In a sorting machine of the class described, the combination of a rotatable sorting drum, means to rotate the drum in either direction,

manipulative means to control the direction of rotation, a pair of stop arms, frictional means cooperating with both of said stop arms to arrest the drum when rotating in either direction, and means controlled by the manipulative means to control both stop arms.

2. In a sorting machine of the class described, the combination of a rotatable sorting drum, means to rotate the drum in either direction, manipulative means to control the direction of rotation of the drum, a pair'of stop arms to an rest the drum when rotating in either direction, means controlled by the manipulative means to control the stop arms, means to lock the drum, and means controlled by each of said stop arms to control the locking means.

3. In a sorting machine of the class described, the combination of a rotatable sorting drum, means to rotate the drum in either direction, manipulative means to control the direction of rotation of the drum, stop arms to arrest the drum when rotating in either direction, means controlled by the manipulative means to control the stop arms, means controlled by the stop arms to lock the drum.

4. In a sorting machine of the class: described, the combination of a rotatable sorting drum, means to rotate the drum in either direction, means to arrest the drum when rotating in either direction, means to lock the drum, and means controlled by the arresting means to hold the locking means in ineffective position until the drum is stopped.

5. In a sorting machine of the class described, the combination of a rotatable sorting drum, means to rotate the drum in either direction, a pair of stop arms to arrest the drum when rotating in either direction, means to lock the drum in arrested position, means controlled by both of said stop arms to hold the locking means in inefiective position until the: drum. has stopped, and a spring to render the locking means: efiective.

6. In a sorting machine of the class described, the combination of a rotatable sorting drum, means to rotate the drum in either direction, manipulative means to control the direction of BEST AVAlLABLE com 5 rotation of the drum, stop arms to arrest the drum when rotating in either direction, means controlled by the manipulative means to withdraw the stop arms toineffective position, and means to latch the stop arms in inefiective position.

7. In a sorting machine of the class described, the combination of a rotatable sorting drum, means to rotate the drum in either direction, manipulative means to control the direction of rotation of the drum, stop arms to arrest the drum when rotating in either direction, means controlled by the manipulative means to withdraw the stop arms to ineffective position, means to latch the stop arms in. ineffective position, and means controlled by the drum torelease the stop arms.

8. In a sorting machine of the class described, the combination of a sorting drum, means to rotate the drum in either direction, manipulative means to control the direction of rotation, a pair of independently mounted stop arms, and a frictional brake member cooperating with both stop arms to arrest the drum when rotating in either direction.

9. In a sorting machine of the class described, the combination of a sorting drum, means to rotate the drum. in either direction, a pair of stop arms one of said stop arms being effective when the drum is rotating in one direction and the other of said stop arms being efiective when the drum is rotating in the opposite direction, and a frictional brake member cooperating with both stop arms to arrest the drum when said drum is rotating in either direction.

10. In a sorting machine of the class described, the combination of a rotatable sorting drum, drive means torotate the drum in either direction, manipulative means including a commutator to control the direction of rotation and to select the position to which the drum is to be rotated, frictional brake means, and a pair of stop arms controlled by the commutator and by the frictional brake means to stop: the drum at the selected position when rotating in either direction.

FREDERICK L. FULLER. SAMUEL BRAND. 

